Title: WP_CACHE setting effects
Last modified: January 8, 2024

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# WP_CACHE setting effects

 *  [islp](https://wordpress.org/support/users/islp/)
 * (@islp)
 * [2 years, 3 months ago](https://wordpress.org/support/topic/wp_cache-setting-effects/)
 * I could not find any docs about **WP_CACHE** constant declared in _wp-config.
   php._ 
   So, what happens when you declare the constant wp_cache, eg. define(“WP_CACHE”,
   true);?

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Moderator [Steven Stern (sterndata)](https://wordpress.org/support/users/sterndata/)
 * (@sterndata)
 * Volunteer Forum Moderator
 * [2 years, 3 months ago](https://wordpress.org/support/topic/wp_cache-setting-effects/#post-17326704)
 * > Prior to [WordPress 2.5](https://wordpress.org/support/wordpress-version/version-2-5/),
   > data stored using the wp_cache functions was stored persistently if you added
   > define(‘WP_CACHE’, true) to your wp-config.php file.
   > This is no longer the case, **and adding the define will have no effect** unless
   > you install a persistent cache plugin (see examples below).
   >  [https://developer.wordpress.org/reference/classes/wp_object_cache/](https://developer.wordpress.org/reference/classes/wp_object_cache/)
 *  Thread Starter [islp](https://wordpress.org/support/users/islp/)
 * (@islp)
 * [2 years, 3 months ago](https://wordpress.org/support/topic/wp_cache-setting-effects/#post-17326731)
 * [@sterndata](https://wordpress.org/support/users/sterndata/) This page should
   be reviewed, imho
 *  [clayp](https://wordpress.org/support/users/clayp/)
 * (@clayp)
 * [2 years, 2 months ago](https://wordpress.org/support/topic/wp_cache-setting-effects/#post-17354115)
 * When you use the WP_CACHE constant in the wp-config.php file, it activate the
   cache for WordPress. This features reduce the server load and improves the site’s
   speed for a smoother experience for users.
   In versions of WordPress before 2.5,
   if you included define(‘WP_CACHE’, true) in the wp-config.php file, the data 
   stored through wp_cache functions would stick around even after you closed the
   website. But things have changed now. Simply adding the define won’t do anything
   unless you’ve installed a special plugin for persistent caching.If you don’t 
   specifically define it, WordPress will automatically set WP_CACHE to false, and
   it won’t load the advanced-cache.php file by default.Caching plugins often mention
   the WP_CACHE constant in their setup files. When multiple caching methods are
   active simultaneously, conflicts can arise. To see if the issue notice disappears,
   try temporarily deactivating caching plugins.
 *  Thread Starter [islp](https://wordpress.org/support/users/islp/)
 * (@islp)
 * [2 years, 2 months ago](https://wordpress.org/support/topic/wp_cache-setting-effects/#post-17354545)
 * [@clayp](https://wordpress.org/support/users/clayp/) I’m a little bit confused.
   Check this thread: [https://wordpress.org/support/topic/wp_cache-constant](https://wordpress.org/support/topic/wp_cache-constant)

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘WP_CACHE setting effects’ is closed to new replies.

## Tags

 * [WP_CACHE](https://wordpress.org/support/topic-tag/wp_cache/)

 * In: [Installing WordPress](https://wordpress.org/support/forum/installation/)
 * 5 replies
 * 3 participants
 * Last reply from: [islp](https://wordpress.org/support/users/islp/)
 * Last activity: [2 years, 2 months ago](https://wordpress.org/support/topic/wp_cache-setting-effects/#post-17354545)
 * Status: not resolved

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